<template>
  <div>
    <!-- 面包屑导航栏 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>商品分类</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 卡片 -->
    <el-card class="box-card">
      <!-- 添加按钮 -->
      <el-row>
        <el-col>
          <el-button type="primary" @click="showAddDialog">添加分类</el-button>
        </el-col>
      </el-row>
      <tree-table :data="cateList" :columns="columns" children-prop="children" :selection-type="false" :expand-type="false" border show-index class="treetable">
        <template slot="isOK" slot-scope="scope">
          <i class="el-icon-success" v-if="!scope.row.cat_delete"></i>
          <i class="el-icon-error" v-else></i>
        </template>
        <template slot="order" slot-scope="scope">
          <el-tag size="mini" v-if="scope.row.cat_level === 0">一级</el-tag>
          <el-tag size="mini" type="success" v-else-if="scope.row.cat_level === 1">二级</el-tag>
          <el-tag size="mini" type="warning" v-else>三级</el-tag>
        </template>
        <template slot="operate" slot-scope="scope">
          <el-button type="primary" icon="el-icon-edit" size="mini" @click="showEditDialog(scope.row.cat_id)"></el-button>
          <el-button type="danger" icon="el-icon-delete" size="mini" @click="removeCateById(scope.row.cat_id)"></el-button>
        </template>
      </tree-table>
      <!-- 分页 -->
      <el-pagination
        background
        @size-change="handleSizeChange"
        @current-change="handleCurrentChange"
        :current-page="queryInfo.pagenum"
        :page-sizes="[1,2, 5, 10]"
        :page-size="queryInfo.pagesize"
        layout="total, sizes, prev, pager, next, jumper"
        :total="total"
      >
      </el-pagination>
      <!-- 添加分类对话框 -->
      <el-dialog title="添加分类" :visible.sync="addDialogVisible" width="30%" @close="addDialogClosed">
        <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="80px">
          <el-form-item label="分类名称" prop="cat_name">
            <el-input v-model="addForm.cat_name"></el-input>
          </el-form-item>
          <el-form-item label="父级分类">
            <el-cascader v-model="selectedKeys" :options="parentCateList" :props="cascaderProps" @change="handleChange" clearable></el-cascader>
          </el-form-item>
        </el-form>
        <span slot="footer" class="dialog-footer">
          <el-button @click="addDialogVisible = false">取 消</el-button>
          <el-button type="primary" @click="addCate">确 定</el-button>
        </span>
      </el-dialog>
      <!-- 编辑分类对话框 -->
      <el-dialog title="编辑分类" :visible.sync="editDialogVisible" width="30%" @close="editDialogClosed">
        <el-form :model="editForm" :rules="editFormRules" ref="editFormRef" label-width="80px">
          <el-form-item label="分类名称" prop="cat_name">
            <el-input v-model="editForm.cat_name"></el-input>
          </el-form-item>
        </el-form>
        <span slot="footer" class="dialog-footer">
          <el-button @click="editDialogVisible = false">取 消</el-button>
          <el-button type="primary" @click="editCate">确 定</el-button>
        </span>
      </el-dialog>
    </el-card>
  </div>
</template>

<script>
export default {
  data() {
    return {
      // 查询分类列表的参数对象
      queryInfo: {
        type: 3,
        pagenum: 1,
        pagesize: 5,
      },
      cateList: [],
      total: 0,
      columns: [
        {
          label: '分类名称',
          prop: 'cat_name',
        },
        {
          label: '是否有效',
          // 使用自定义模板类
          type: 'template',
          // 模板名称
          template: 'isOK',
        },
        {
          label: '排序',
          type: 'template',
          template: 'order',
        },
        {
          label: '操作',
          type: 'template',
          template: 'operate',
        },
      ],
      // 添加分类
      addDialogVisible: false,
      addForm: {
        cat_name: '',
        cat_pid: 0,
        cat_level: 0,
      },
      addFormRules: {
        cat_name: [{ required: true, message: '请输入分类名称', trigger: 'blur' }],
      },
      parentCateList: [],
      cascaderProps: {
        label: 'cat_name',
        value: 'cat_id',
        children: 'children',
        expandTrigger: 'hover',
        checkStrictly: 'true',
      },
      selectedKeys: [],

      // 编辑分类
      editDialogVisible: false,
      editForm: {},
      editFormRules: {
        cat_name: [{ required: true, message: '请输入分类名称', trigger: 'blur' }],
      },
    }
  },
  created() {
    this.getCateList()
  },
  methods: {
    async getCateList() {
      const { data: res } = await this.$http.get('categories', {
        params: this.queryInfo,
      })
      if (res.meta.status !== 200) {
        return this.$message.error('获取商品分类失败！')
      }
      this.cateList = res.data.result
      this.total = res.data.total
    },
    handleSizeChange(pagesize) {
      this.queryInfo.pagesize = pagesize
      this.getCateList()
    },
    handleCurrentChange(pagenum) {
      this.queryInfo.pagenum = pagenum
      this.getCateList()
    },
    // 添加分类
    async getParentCateList() {
      const { data: res } = await this.$http.get('categories', {
        params: { type: 2 },
      })
      if (res.meta.status !== 200) {
        this.$message.error('获取父级分类数据失败')
      }
      this.parentCateList = res.data
    },
    showAddDialog() {
      this.getParentCateList()
      this.addDialogVisible = true
    },
    handleChange() {
      if (this.selectedKeys.length > 0) {
        this.addForm.cat_pid = this.selectedKeys[this.selectedKeys.length - 1]
        this.addForm.cat_level = this.selectedKeys.length
      } else {
        this.addForm.cat_pid = 0
        this.addForm.cat_level = 0
      }
    },
    addCate() {
      this.$refs.addFormRef.validate(async (valid) => {
        if (!valid) {
          return
        }
        const { data: res } = await this.$http.post('categories', this.addForm)
        if (res.meta.status !== 201) {
          this.$message.error('添加分类失败')
        }
        this.addDialogVisible = false
        this.getCateList()
        this.$message.success('添加分类成功')
      })
    },
    addDialogClosed() {
      this.$refs.addFormRef.resetFields()
      this.selectedKeys = []
      this.addForm.cat_pid = 0
      this.addForm.cat_level = 0
    },

    // 编辑分类
    editDialogClosed() {
      this.$refs.editFormRef.resetFields()
    },
    async showEditDialog(cateId) {
      const { data: res } = await this.$http.get('categories/' + cateId)
      if (res.meta.status !== 200) {
        this.$message.error('查询分类失败')
      }
      this.editForm = res.data
      this.editDialogVisible = true
    },
    editCate() {
      this.$refs.editFormRef.validate(async (valid) => {
        if (!valid) {
          return
        }
        const { data: res } = await this.$http.put('categories/' + this.editForm.cat_id, {
          cat_name:this.editForm.cat_name
        })
        if (res.meta.status !== 200) {
          this.$message.error('编辑分类失败')
        }
        this.editDialogVisible = false
        this.getCateList()
        this.$message.success('编辑分类成功')
      })
    },

    // 删除分类
    removeCateById(id) {
      this.$confirm('确定删除该分类吗？', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning',
      })
        .then(async () => {
          const { data: res } = await this.$http.delete('categories/' + id)
          if (res.meta.status !== 200) {
            return this.$message.error('删除分类失败！')
          }
          this.getCateList()
          this.$message.success('删除分类成功！')
        })
        .catch(() => {
          this.$message.info('已取消删除')
        })
    },
  },
}
</script>

<style lang="less" scoped>
.treetable {
  margin-top: 15px;
}
.el-icon-success {
  color: lightgreen;
}
.el-icon-error {
  color: red;
}
.el-cascader {
  width: 100%;
}
</style>
